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R. J. HENRY, J12, & H. K. BROWN.

PROTECTOR FOR THE COVERS 0? BO0K8. No. 888.889. Patented Aug; 23, 1887.,

N PETERS, Pholn-Limugmpher, Washingmm DJ;

UN-lTED STATES PATENT OFFICE.

, REMI J. HENRY, JR.,-OF JEREEY CITY, NEW JERSEY, AND HARRY K. BROWN, OFBROOKLYN, YORK.

PROTECTOR FOR THE COVERS OF BOOKS.

SPECIFICATION forming part of Letters Patent No. 368,889, dated August23,1887. Application filed October 10, 1884. Serial No.145,155. (ModeL)To all whom it may concern.-

Be it known that we, REMI J. HENRY, J r., of Jersey City, in the countyof Hudson and State of New Jersey, and HARRY K. BROWN,

of Brooklyn, in the county of Kings and State of New York, have inventeda new and useful Protector for the Covers of Books and Similar Articles,of which the following is a specifica' tion.

Our invention relates to protecting the covers and bindings of books,portfolios, and similar articles; and the object of the invention is toprovide an improved self-adjustable water-- inserted in one of thepockets of the protector.

Fig. 2 is a section of the protector taken on line at x of Fig. 2; andFig. .3 is a perspective view of a book and protector, showing themanner of placing the protector on the covers ofthe book.

The blank for the protector is formed from sheet-rubber. The back A,sides B B, and the flaps which form the pockets are integral with eachother. On the edges of the sides B Bare the flaps, which, when folded,form the pock ets for the covers or lids of the book. The top andbottom-flaps, O O, are triangular projections of the top and bottomedges. The bases of said triangular projections coincide with the lines(to. The flaps G O are single-that is, there is but one flap for eachedge-and the folding-lines a a do not extend to the foldinglines I Z,which divide the back A from the sides '13 B. The top and bottom flaps,O, are single-that is, there is but one flap for each edge of the topand bottom of the protectorand these flaps do not extend to thefoldingline of the back. (Indicated by dotted lines.)

The flaps O are triangular, the base being on the dotted line a, whichis the folding-line of the said flaps. When the flaps'are turned down,they are folded or bent on the line a.

This leaves the edges 6 at top and bottom projecting beyond the foldededges of the flaps, (see Fig. 2,) and these projecting edges pro tectthe edges of the lids or covers and the back which are not covered bythe flaps. The object of this construction is to facilitate putting theprotector on books, and to avoid multiplying the folds of material atthejunction of the flaps. The protector being made of sheet-rubber, andput on the book by stretch- 6o ing one side of it until the cover onthat side will pass into the pocket formed by the flaps,

it is necessary that the pockets be formed so that the cover will enterthe pocket without unduly stretching the protector; and to facilitatethe stretching of the rubber a part of the top edges on each side of theback A, extending from 1 to 3, should be left of a single thickness,like the back portion, A. At the same time the edges of the book-covers,which are thus left out of the pockets, are sufficiently protected bythe edges e, which project beyond them, as described, and as clearlyshown in Fig. 2.

The outer sides, I), of the flaps C are cut off atfin line with thefolding-line g of the side flaps, D, so that a smooth fold can be formedat the corners.

The sideflaps, D D, are formed into two triangular parts, h h, there-entrant angle 13 between them not extending to the dotted line g, 30which indicates the folding-line of the side flap. The angle i may,however, be deeper than shown, but should not extend to the dotted line9, as the edges of the book-covers extend to that line, and they wouldbe uncovered 5 were the angular incut carried to line g.

The sides j j of flaps D are cut to the same angle as the sides b of theflaps O, and the sides 70 k of the re-entrant angle are cut to the sameangle as the sides I) of the flaps O O, the 9 purpose of theconstruction described being to have the sides bj lie parallel toeachother when the flaps are turned down, and the sides b k align. The sidesj thus overlap the sides I), and when vulcanized a strong homogeneousconnection is made between the flaps O O and D, which is as elastic asany part of the protector; but the flaps may be cut so that the edges ofthe sides will abut instead of overlap, if preferred, and vulcanized inthat way. A I00 V-shaped opening, L, is left in the folded-over side ofthe protector-pocket, as shown, and this greatly facilitates placing theprotector on the books, as will be more fully explained presently.

Made as above described, the protector is of uniform thickness, exceptwhere the edges of the flaps join each other. The flaps do not extendunder or over each other, and thus practically both sides of theprotector are of the same thickness.

The manner of placing the protector on the book is illustrated by Fig.3. One side of the cover is first inserted in the pocket on one side ofthe protector. The book is then turned down on the inserted side of thecover. The other side is now turned up so as to be at an obtuse angle tothe book or so as to lie parallel thereto. The free side of theprotector is then turned partly off the book and stretched until onecorner of the cover will pass under the flap above the angle 6, (the Vshape of the opening L greatly facilitating this operation, as when thecover and protector are in the position indicated in Fig. 3 it is onlynecessary to stretch the material the distance between the angle 1 andthe edge of the protector.) The protector is then drawn toward the sideof the cover until the inserted corner passes into the pocket, whereuponthe protector is again stretched until the other corner of the coverwill pass under the flap below the angle '6 and enter the pocket, whichcoinplets the operation of placing the protector on the book.

.The material being thin sheet-rubber, and 7 between the pockets on eachside of a single thickness, no difficulty is found in stretching itsufliciently to place the protector on the book with ease, and for thesame reason it will accommodate itself readily to the slight vari'ations in the size and thickness of book-covers.

We claim-- 1. A blank for book-cover protectors, made of elasticwater-repellent material, and composed of the following parts: back A,sides B B, top and bottom flaps, O G, on each of sides B B, side flaps,D D, having re-entrant angles it, the apices whereof do not extend tothe folding-lines g all of said parts-viz., the sides, back, andflaps-bein g integral with each other, substantially as specified.

2. A made-up book-cover protector consist ing of sides, back, andpockets integral with each other, and composed of an elasticwaterrepellent material, and consisting of the following parts, viz:back A, sides B B, pockets composed of triangular top and bottom flaps,C C, and side flaps, D, having re-entrant angles 6 i, the apices whereofdo not extend to the folding-lines g g of the side flaps, the said topand bottom flaps, O O, and side flaps, D I), having their contiguousedges cemented together, substantially as specified.

3. Aprotector forthelids or covers of books, 8m, made of elasticwater-repellent material, constructed in the following manner and of thefollowing parts, viz: back A, sides B 13, end flaps, O O, folded on thelines a a, so that the edges 6 e between the flaps project beyond thefolded edges of the flaps, and flaps D D, having their edges joined tothe adjacent edges of the flaps G O, substantially as specified.

REMI J. HENRY, JR. HARRY K. BROWN.

Witnesses:

JAMES T. GRAHAM, EDGAR TATE.

